3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $y = null; $b = 1; $x = $y ?? $b; var_dump($x);
based on Ca4PT
Output for 7.0.0 - 7.2.0
int(1)
Output for 5.3.18 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/D66WA on line 5
Process exited with code 255.